Silicon eyes: GPS-GSM based navigation assistant for visually impaired using capacitive touch braille keypad and smart SMS facility

This paper proposes an aim to provide blind navigation information via audible messages and haptic feedback, helping the visually disabled to localize where they are and their mobility path way. This also proposes a method that allows blind people to enter notes and control device operation via Braille capacitive touch keypad instead of sending SMS by entering the number and text. An emergency button triggers an SMS from the GSM module that will send the present location (GPS coordinates) of the user to a remote phone number asking for help. In addition, the device provides the information needed to the user, in audio format using audio codec, including time, calendar, and object color using a 24-bit color sensor, obstacle distance using SONAR, navigation direction, ambient light and temperature conditions.